Improvement in valves for steam vacuum-pumps



H. NYE. VaIv-as for Steam `Vacuum-Pumps Patented Dec.15,1874.

lNITED STATES4 GEORGE H. NYE, OF MONMOUTH, ILLINOIS.

IMPROVEMENT IN'VALVES FOR STEAM VACUUM-PUMPS.

Specification forming part of Letters Patent No. 157,863, dated December15, 1874; application filed October 13, 1874.

To all whom it may concern:

Be it known that I, GEORGE H. NYE, of Monmouth, in the county of Warrenand State of Illinois, have invented a new and useful Improvement inSteam Vacuum-Pumps, of which the following is a specication:

The object of the present invention is to improve the pumps patented tome November 5, 1872. The nature of the improvement consists in asteam-cylinder placed on the top of the pump-cylinders, and providedwith a reciprocating double-cup valve, which, when under a proper forceof steam, moves back and forth in its cylinder, and alternately conductssteam, by means of suitable ports, into the pump-cylinders, wherebywater is forced out of one pump-cylinder, while a vacuum is produced inthe other cylinder, and vice-versa; the mechanism in the bottom of thepumpcylinders (similar 'to that in the patent referred to) beinghereinafter fully described and shown.

In the drawings, Figure 1 is a vertical sec tional elevation of myimprovement as applied to the pump-cylinders of my patents datedNovember 5, 1872, and numbered 132,732 and 132,731; Fig. 2, an enlargedhorizontal section of the valve-cylinder, taken on line cc, Fig. l; Fig.3, a plan view of the base on which the steam-cylinders are placed,showing the position of the pipes, ducts, and valves therein 5 also theposition of said cylinders, in section, on the base.

A A' represent the pump-cylinders, which are constructed of iron, ofsuitable strength to withstand the required pressure of steam, and arebolted fast to a base, B, as in said patent. On top of these cylindersis placed another cylinder', 1, which is held in position by means ofbolts 2, put through the ends of the conduit-pipes 3 3', Which are castsolid to the cylinder l, and communicate with it. In this cylinder 1 isplaced a double-cupped steam-valve 4 4', which is provided with a seriesof ports, 5 5', communicating with annular grooves 6 on the inside ofthe cylinder 1. The rod 7, connecting the cups 4 4', is provided withtwo flanges, 8, between which an arm, 10, on shaft 9 operates, a wheel,11, being fastened to said shaft for the convenience of operating thevalve outsidei of the cylinder 1. There lis also leading from thecylinder 1 and into conduit-pipes 3 ducts 12,

for a purpose stated in the operation. An air-chamber or condenser, H h,is supported by the base B, and communicates with the steam-cylinders AA' by means of ducts I I' in the base B. i i' are valves on the ends ofthe ducts in the enlarged lower end of the pipe h. J J' are smallerducts, also leading from the cylinders A A' to the same enlarged part. TT' are pipes leading from the cylinders A A' to the discharge-pipe S,and Gis the water-inlet pipe, leading by ducts g g', through valves g"and g, into cylinders A A', as in said patent. A

The operation is as follows: The pump-cylinders A Al are primed andstarted in the ordinary manner known to the art. The double-cup valve 44' being so set as to bring the ports 5 of cup 4 over the conduit-pipe3', steam drives the Water out of cylinder A, and at the same timeforces so much water into the condenser II It as will compress the airtherein to a corresponding pressure to that of the steam in the cylinderA. As soon as the Water is all forced from the cylinder A through duct Tand valve t, the steam comes under the water in passage T, Fig. 3,reducing the steam-pressure in cylinder A. At the same time the air incondenser H h drives the water back through duct J. Up to the time ofthis partial exhaust the valve 4 4 remains stationary; but now suchexhaust has relieved the pressure from the outer end of cup 4 by meansof duct 12. The force of steam now moves the valve 4 4' so as to bringports 5' over conduit-pipe 3 and close conduit 3', and the operation ofcylinder A' is the same as in cylinder A, causing a continuous ow ofwater through pipe S.

To clean the cylinder' l of sand or other substance, turn the wheel 1lback and forth, giving the valve a reciprocating movement.

I claim as new- A valve consisting of rod 7, flanges 8, oups 4 4', withports 5 5' through them, in combination with cylinder I, provided withannular grooves 6, shaft 9, arm lO, and wheel 11, conduit-pipes 3 3',and ducts 12, arranged to operate a steam vacuumpump, substantially asdescribed.

GEORGE H. NYE. Witnesses:

JOHN H. ELLIOTT, G. L. GHAPIN.

